1 #ifndef _IP_H_
2 #define _IP_H_ 1
3 #if defined(__cplusplus)
4 extern "C" { 
5 #endif
6 
7 AUTOLIB(ip)
8 /*
9 #pragma	src	"/sys/src/libip"
10 #pragma	lib	"libip.a"
11 #pragma	varargck	type	"I"	uchar*
12 #pragma	varargck	type	"V"	uchar*
13 #pragma	varargck	type	"E"	uchar*
14 #pragma	varargck	type	"M"	uchar*
15 */
16 enum 
17 {
18 	IPaddrlen=	16,
19 	IPv4addrlen=	4,
20 	IPv4off=	12,
21 	IPllen=		4
22 };
23 
24 /*
25  *  for reading /net/ipifc
26  */
27 typedef struct Ipifc Ipifc;
28 typedef struct Iplifc Iplifc;
29 typedef struct Ipv6rp Ipv6rp;
30 
31 /* local address */
32 struct Iplifc
33 {
34 	Iplifc	*next;
35 
36 	/* per address on the ip interface */
37 	uchar	ip[IPaddrlen];
38 	uchar	mask[IPaddrlen];
39 	uchar	net[IPaddrlen];		/* ip & mask */
40 	ulong	preflt;			/* preferred lifetime */
41 	ulong	validlt;		/* valid lifetime */
42 };
43 
44 /* default values, one per stack */
45 struct Ipv6rp
46 {
47 	int	mflag;
48 	int	oflag;
49 	int 	maxraint;
50 	int	minraint;
51 	int	linkmtu;
52 	int	reachtime;
53 	int	rxmitra;
54 	int	ttl;
55 	int	routerlt;	
56 };
57 
58 /* actual interface */
59 struct Ipifc
60 {
61 	Ipifc	*next;
62 	Iplifc	*lifc;
63 
64 	/* per ip interface */
65 	int	index;			/* number of interface in ipifc dir */
66 	char	dev[64];
67 	uchar	ether[6];
68 	uchar	sendra6;		/* on == send router adv */
69 	uchar	recvra6;		/* on == rcv router adv */
70 	int	mtu;
71 	ulong	pktin;
72 	ulong	pktout;
73 	ulong	errin;
74 	ulong	errout;
75 	Ipv6rp	rp;
76 };
77 
78 /*
79  *  user level udp headers
80  */
81 enum 
82 {
83 	Udphdrsize=	52	/* size of a Udphdr */
84 };
85 
86 typedef struct Udphdr Udphdr;
87 struct Udphdr
88 {
89 	uchar	raddr[IPaddrlen];	/* remote address and port */
90 	uchar	laddr[IPaddrlen];	/* local address and port */
91 	uchar	ifcaddr[IPaddrlen];	/* address of ifc message was received from */
92 	uchar	rport[2];
93 	uchar	lport[2];
94 };
95 
96 uchar*	defmask(uchar*);
97 void	maskip(uchar*, uchar*, uchar*);
98 int	eipfmt(Fmt*);
99 int	isv4(uchar*);
100 ulong	parseip(uchar*, char*);
101 ulong	parseipmask(uchar*, char*);
102 char*	v4parseip(uchar*, char*);
103 char*	v4parsecidr(uchar*, uchar*, char*);
104 int	parseether(uchar*, char*);
105 int	myipaddr(uchar*, char*);
106 int	myetheraddr(uchar*, char*);
107 int	equivip(uchar*, uchar*);
108 long	udpread(int, Udphdr*, void*, long);
109 long	udpwrite(int, Udphdr*, void*, long);
110 
111 Ipifc*	readipifc(char*, Ipifc*, int);
112 void	freeipifc(Ipifc*);
113 
114 void	hnputv(void*, uvlong);
115 void	hnputl(void*, uint);
116 void	hnputs(void*, ushort);
117 uint	nhgetl(void*);
118 uvlong	nhgetv(void*);
119 ushort	nhgets(void*);
120 ushort	ptclbsum(uchar*, int);
121 
122 int	v6tov4(uchar*, uchar*);
123 void	v4tov6(uchar*, uchar*);
124 
125 #define	ipcmp(x, y) memcmp(x, y, IPaddrlen)
126 #define	ipmove(x, y) memmove(x, y, IPaddrlen)
127 
128 extern uchar IPv4bcast[IPaddrlen];
129 extern uchar IPv4bcastobs[IPaddrlen];
130 extern uchar IPv4allsys[IPaddrlen];
131 extern uchar IPv4allrouter[IPaddrlen];
132 extern uchar IPnoaddr[IPaddrlen];
133 extern uchar v4prefix[IPaddrlen];
134 extern uchar IPallbits[IPaddrlen];
135 
136 #define CLASS(p) ((*(uchar*)(p))>>6)
137 
138 #if defined(__cplusplus)
139 }
140 #endif
141 #endif